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Figure shows three concentric conducting...

Figure shows three concentric conducting spherical shells of radii a,b and c `(c gt b gt a)` . The innermost and outermost shell are given charge s`Q_(1)` and `Q_(2)` respectively, and the middle shell had been earthed. Select the correct alternative(s) .

A

The total charge on middle shell is zero

B

If `|Q_(1) | gt |Q_(2)|` total charge on middle shell has opposite sign as that of `Q_(1)`

C

The charge on the outer surface of outermost shell is `Q_(2) [ 1- ( b)/( c )]`

D

The potential at a point outside the outermost shell is `((1-(b )/(c ))Q_(2))/(4 pi epsilon_(0)r)`, where r is distance from 0.

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(2,3,4)
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